问题
I've try implement Firebase Cloud Messaging with Flutter, and i was success until i use 'Local Notification' plugin for show notification
My notification work fine on foreground, but on background this show this error:
[ERROR:flutter/lib/ui/ui_dart_state.cc(157)] Unhandled Exception: MissingPluginException(No implementation found for method show on channel dexterous.com/flutter/local_notifications)
I use Firebase Cloud Messaging 6.0.9, Local Notification 1.2.0+4 and latest Flutter
Here is my code: NotificationHandler
import 'package:flutter_local_notifications/flutter_local_notifications.dart';
class NotificationHandler{
static final flutterLocalNotificationsPlugin = FlutterLocalNotificationsPlugin(); // make it a static field of the class
static void initNotification()
{
// initialise the plugin. app_icon needs to be a added as a drawable resource to the Android head project
var initializationSettingsAndroid = AndroidInitializationSettings('@mipmap/ic_launcher');
var initializationSettingsIOS = IOSInitializationSettings(
onDidReceiveLocalNotification: onDidReceiveLocalNotification);
var initializationSettings = InitializationSettings(
initializationSettingsAndroid, initializationSettingsIOS);
flutterLocalNotificationsPlugin.initialize(initializationSettings,
onSelectNotification: onSelectNotification);
}
static Future onSelectNotification(String payload) async {
if (payload != null) {
print('notification payload: ' + payload);
}
}
static Future onDidReceiveLocalNotification(int id, String title, String body, String payload) {
print(title+" "+body);
}
}
ShowNotification method
static void showNotification(data, data2) async {
var androidPlatformChannelSpecifics = new AndroidNotificationDetails(
'dexterous.com.flutter.local_notifications', 'your channel name', 'your channel description',
importance: Importance.Max,
priority: Priority.High);
var iOSPlatformChannelSpecifics =
new IOSNotificationDetails();
var platformChannelSpecifics = new NotificationDetails(
androidPlatformChannelSpecifics, iOSPlatformChannelSpecifics);
await NotificationHandler.flutterLocalNotificationsPlugin
.show(
0,
data,
data2,
platformChannelSpecifics,
payload: 'Custom_Sound',
);
}
回答1:
I have found solution, that why in platform side we don't register for outside plugin
Add in your FCMPluginRegistrant.java like
public final class FirebaseCloudMessagingPluginRegistrant {
public static void registerWith(PluginRegistry registry) {
if (alreadyRegisteredWith(registry)) {
return;
}
FirebaseMessagingPlugin.registerWith(registry.registrarFor("io.flutter.plugins.firebasemessaging.FirebaseMessagingPlugin"));
FlutterLocalNotificationsPlugin.registerWith(registry.registrarFor("com.dexterous.flutterlocalnotifications.FlutterLocalNotificationsPlugin"));
}
private static boolean alreadyRegisteredWith(PluginRegistry registry) {
final String key = FirebaseCloudMessagingPluginRegistrant.class.getCanonicalName();
if (registry.hasPlugin(key)) {
return true;
}
registry.registrarFor(key);
return false;
}
}
And call it on Application.java
@Override
public void registerWith(PluginRegistry registry) {
FirebaseCloudMessagingPluginRegistrant.registerWith(registry);
}
回答2:
For Kotlin : Application.kt
package your.package.name
import io.flutter.app.FlutterApplication
import io.flutter.plugin.common.PluginRegistry
import io.flutter.plugin.common.PluginRegistry.PluginRegistrantCallback
import io.flutter.plugins.firebasemessaging.FirebaseMessagingPlugin
import io.flutter.view.FlutterMain
import io.flutter.plugins.firebasemessaging.FlutterFirebaseMessagingService
import com.dexterous.flutterlocalnotifications.FlutterLocalNotificationsPlugin
class Application : FlutterApplication(), PluginRegistrantCallback {
override fun onCreate() {
super.onCreate()
FlutterFirebaseMessagingService.setPluginRegistrant(this);
FlutterMain.startInitialization(this)
}
override fun registerWith(registry: PluginRegistry?) {
if (!registry!!.hasPlugin("io.flutter.plugins.firebasemessaging")) {
FirebaseMessagingPlugin.registerWith(registry!!.registrarFor("io.flutter.plugins.firebasemessaging.FirebaseMessagingPlugin"));
}
if (!registry!!.hasPlugin("com.dexterous.flutterlocalnotifications")) {
FlutterLocalNotificationsPlugin.registerWith(registry!!.registrarFor("com.dexterous.flutterlocalnotifications.FlutterLocalNotificationsPlugin"));
}
}
}
来源:https://stackoverflow.com/questions/60471697/missingpluginexceptionno-implementation-found-for-method-show-on-channel-dexter